Stentor Classification Activity Sheet
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1Name
Date
Stentor
STUDENT RESOURCE 1.5
ACTIVITY SHEET
Stentors are one-celled protozoans. A stentor can retract its body
into a ball to hide. Look for a blue-green ball or a trumpet shape.
When you see a stentor, look for the structures shown in the
diagram.
Cilia
Mouth
(move the cell)
(takes in food)
Contractile vacuole
(squirts out extra water)
Nucleus
(controls the cell;
looks like a string
of beads)
Movement A stentor moves by beating the cilia that cover its
body.
Feeding A stentor waves the cilia around its mouth and sweeps
in food.
Reproduction When a stentor gets too large, it divides in half.
Size 1 to 2 mm (one of the largest protists)
Answer the following question.
Green photosynthetic algae often live inside stentors. How could
this help a stentor?
CLASSIFICATION • SECTION 1 MICROORGANISMS
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